$ git clone -n https://src.fedoraproject.org/rpms/R-bit64.git /var/lib/mock/f33-build-332580-58321/root/chroot_tmpdir/scmroot/R-bit64
Cloning into '/var/lib/mock/f33-build-332580-58321/root/chroot_tmpdir/scmroot/R-bit64'...
$ git reset --hard c21b19ad28fb24b86b9c04fb9f7ca79c04e24e2b
HEAD is now at c21b19a Update to latest version.